iOS 9.9.11.0.2 (build 15A421) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-03T17:03:28Z. The update package is 1.22 GB. This is a delta (partial) update that requires 9.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 374e70b0f0bad1063fc0ac49a27c2fd5a3883d93.zip.